I've tried froyo at many different places and perhaps I'm a bit spoiled by that. What makes for good yogurt in my mind has to do with a few things: flavor, consistency, and level of sweetness.
This place is not up to par on two of the three factors. The yogurt that came out of the dispenser was half melted. It didn't hold its shape and just seemed to spread itself across the bottom of the cup. This happened across three different dispensers so I was sure it wasn't an isolated machine. When it came to sweetness, they went overboard. The yogurt was so sweet it made me cough after swallowing a free spoonfuls. Maybe locals prefer that, but I think it takes away from the flavor. As for flavor, there was a good variety. In fact, I was impressed by the choices.
In summary, it'll do in a pinch, but I'd rather spend the calorie budget on something else if given a choice.